Pennsylvania Railroad class HH1s

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HH1s class

Postcard depiction of Pennsylvania Railroad #3396.

Type and origin
Power type	Steam
Designer	Francis Cole
Builder	ALCO
Build date	1911

Specifications
Configuration:
• Whyte	2-8-8-2
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Fuel type	Coal
Firebox:
• Type	wagon-top
Cylinders	Four
Valve gear	Walschaerts
Valve type	Piston

Career
Operators	Pennsylvania Railroad
Class	HH1s
Numbers	3396
Retired	1928
Disposition	scrapped

The Pennsylvania Railroad's class HH1s comprised a single 2-8-8-2 type steam locomotive. Unlike most Pennsylvania Railroad steam locomotives, it had a wagon-top boiler. It was built by the American Locomotive Company (ALCO) in 1911. For 17 years, the single HH1s served as a helper until 1928. It had the road number 3396 and was subsequently scrapped after it was taken out of service in 1928.

References

Withuhn, William L. (1 March 2019). American Steam Locomotives: Design and Development, 1880–1960. Indiana University Press. ISBN 978-0-253-03934-7. Retrieved 27 November 2024.
Drury, George H., ed. (1993). Guide to North American steam locomotives. Kalmbach Books. ISBN 978-0-89024-206-3. Retrieved 27 November 2024.

Pennsylvania Railroad locomotives

A (0-4-0):	A1 A2 A3 A4 A5s
B (0-6-0):	B1 (s) B2 B3 B4 B5 B6 B7 B8 B1 (e)
C (0-8-0):	C1 C29 C30 C31
D (4-4-0):	D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 D21 D22 D23 D24 D25 D26 D30 D31 D32 D33 D34 D35 D36 D37 D38 D39 D61 "Odd D" #10003
E (4-4-2):	E1 E2 E3 E4 E5 E6 E7 E21 E22 E23 E28 de Glehn
F (2-6-0):	F1 F2 F3 F21 F22 F23 F24 F25 F26 F27 F30 F31 F61
G (4-6-0):	G1 G2 G3 G4 G5 G6 G53

H (2-8-0):	H1 H2 H3 H4 H5 H6 H8 H9 H10
I (2-10-0):	I1
J (2-6-2 and 2-10-4):	J1 J28
K (4-6-2):	K1 K2 K3s K4s K5 K21s K28 K29s
L (2-8-2):	L1s L2s L5 L6
M (4-8-2):	M1
N (2-10-2):	N1s N2s
O (4-4-4):	O1

P (4-6-4):	P5
Q (4-6-4-4 and 4-4-6-4):	Q1 Q2
R (4-8-4):	R1
S (6-4-4-6 and 6-8-6):	S1 S2
T (4-4-4-4):	T1
Articulated steam locomotives:	CC1s CC2s HC1s HH1 HH1s HH2s
Articulated electric locomotives:	AA1 BB1 BB2 BB3 DD1 DD2 FF1 FF2 GG1
Non-standard:	E2b E2c E3b E44

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